Improvement in adding-machines



D. L. R. BUTT.

ADDING-MACHINE.

No.1'70,708 Patented De. 7,1875.

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N.PE` ERS, PHUTO-LITMOGRAPHER, lWASHINGTON, D C,

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'UNITED STATES PATENT OFFICE.

DENNIS L. R. BUTT, OF PILOTPOINT, TEXAS.

IMPROVEMENT I N ADDING-MACHINES.

Specification formingr part of Letters Patent No. 170,708, dated December '7, 1875 application tiled November 30, 1874.

To all whom it may concern:

Be it known that I, DENNIS L. R. BUTT, of Pilot Point, in the county of Denton and State of Texas, have invented a new and Improved Adding-Machine, of which the following is a specification Figure 1 is a pla-n view of my improved adding-machine. Fig. 2 is a sectional elevation taken on the line w of Fig. 1. Fig. 3 is a plan of a portion of the machine, showing a modified arrangement.

Similar letters of reference indicate corresponding parts.

The simplest form of the machine consists, essentially, of the wheel A, Fig. 1, say sixteen inches in diameter, with one hundred teeth or projections, a, on the rim, a half inch apart. On the surface of the wheel, near the rim, at b, are the numbers, from l to 100, inclusive, opposite the projections. This wheel turns on a pivot, G, underneath the bottom C of the frame F and slide B.

Around the wheel is a circular stationary rim, D, upon Which are raised figures or characters E, representing the numbers from 0 to 10, inclusive-one for every ten of the teeth or projections of wheel A. Opposite the rst ten, or from 0 to 10, are the same raised figures or characters in reversed order, one at each projection marked E2.

F is a grooved bar, in which the slide B re- Upou the latter are inscribed the numbers f, from 0 to any number desired. On the under side, and corresponding with the numbers on top, are the cleats or ribs b', which are set at such an angle with B that the pin K on the wheel A moves the slide B one number each revolution, or one hundred, on A.

The edges ofB on the underside are rounded, making it convex, so that the top of the pin K will raise the slide B above the catch G2 before moving it' one space. This catch is set at the same angle with the cleats b', and should be about half the height of those pieces. It is intended to prevent the slide B from moving except when actuated by the pin K. Through the bottom C, and in the block d, is a pivot, G2, by which the slide Brand frame F C can be removed, so as to raise the wheel A above the pivot G, having rst removed the fastening-nut c.

To add one column according to a regular scale of tens, set the point 0 of column b on Wheel A to H, and slide the 0 on B to H; then move the projection a opposite 0 of E2 toward H till it reaches the figure or character representing the first number to be added. Leaving it there, go back to 0 and move the projection then opposite it toward H till it reaches the second number to be added, and so on till the column is finished, when the units will be found in the outside line of column b on A, the tens in the inside line opposite the point 0 of E2, the hundreds in the line f on B. Set

down the units, say 8, and keeping the-hun;

dreds, say 27, in mind, with the left hand take hold of the pin B', and, raising a little, push the slide back till 0 reaches H. At the same time with the right hand set the wheel A so that 27 will be at H; then proceed with the next column in the same manner.

To add two columns by aregular scale of tens, set the machine as before. Say 37 isvthc first number, find the tens, third section E on D, above 0 of E2, and move the projection of wheel that'is opposite it toward H till it reaches the units 7 on E2 below D, when 37 will appear at H. If 86 be the next number, iind the tens in the eighth section E on D, above X of E2, and move the projection to right toward H till it reaches the units 6 below 0 in E2, when 23 will appear at H, and l on the slide B. Continue the operation till the two columns are finished, when the units will be found in the outside line of column b, the tens in the inside line, the hundreds in f on B, and the thousands in line V on B. Set down the units and tens, say 54., and, while resetting the slide B, set the hundreds and thousands, say 14, on A at H. Add the next two columns as before, setting down the units and tens to the left of the 54. v

To add one or two columns according to a varying scale, say 1() :,G, s., 12 d., (pounds, shillings, pence,) a wheel, of which a fragment is shown in Fig. 3, is used having two rows of teeth or projections, a, the lower containing twelves, and the upper tens and twenties. The surface of the wheel has three concentric rows of figures, a2, b2, and d o, the outer of twelves, the middle of twenties, and the inner of tensthat is, ten tens, or one hundred, ten twelves,

or one hundred and twenty, and tenjwenties, or two hundred.

The stationary rim D has raised figures or characters at each ten, as in Fig. 1. It has also the three pieces E4 E5 E6, say of tin, with raised figures or characters, pivoted at L, corresponding in position with 0 on E2, the bottom piece, E4, containing` the numbers from X to 12, the next, E5, from X to 10, the top, E, from 0 to 10, on a scale double that of E4. Other parts are the same as Fig. 1, having one pin, K. working the slide B.

Set 0 to H, as before. Move the tooth or projection which is opposite X 0 toward H till it reaches the tirst number of' pence to be ad ded, say 10, 1 X; then go back to X O, and move the projection then opposite X 0 toward H till it reaches the second number to he added, and so on till the column is nished, when the pence will be found in the line c2, the units of the shillings in the line d, and the tens of shillings in the line f B. Set down the pence, and in resetting B set the shillings, say 23,011 b2 at H; then bring E5 to cover E4, and the ma chine is ready for the shillings. If the first number is less than ten, or if one figure, move the projection opposite X E5 toward H till it reaches the number to be added. If more than ten, or of two gures, move the projection opposite 11 E5 or X 0 E4 toward H till it reaches the units of the number, continuing the operation till the shillings are all added,v when the odd shillings will be found in the line b2, the units of pounds in the line d, the tens and hundreds of pounds on f B.

Set down the shillings and set B 0 to H, and set line d eso that the tens and hundreds of pounds will be at H; then bring down E6 to cover E5, and add the pounds like simple numbers.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination of the pieces E4, E5, and Es with the disk D, wheel A, frame F, and slide B, substantially as specified.

DENNIS L. R. BUTT.l

Witnesses:

J. B. BIFFLE, THos. J. BELcHoR. 

